阅读说明：本技术 一种膜硫化物污染专用清洗剂 (Special cleaning agent for membrane sulfide pollution ) 是由 蒋璨 于 2019-09-10 设计创作，主要内容包括：本发明有关涉及可去除膜硫垢的清洗剂领域,一种膜硫化物污染专用清洗剂,由如下体积份数的组分构成：主成分10份～60份；次成分20份～50份；助溶剂5份～8份；相稳定剂5份～50份；溶剂10份～80份；其中主成分为氢氧化钠、氢氧化钾中的一种或其组合；次成分为二甲基二硫醚,脂肪醇聚氧乙烯醚,TX-10中的一种或其组合。本清洗剂无刺激性、对不锈钢和碳钢腐蚀性小,溶解膜硫垢后清洗剂相体系稳定。同时经过除硫的清洗剂通过冷却降温等简单操作手段,可使体系中的硫形成结晶硫析出清洗剂体系,该清洗剂可继续循环使用,降低了清洗成本。另该清洗剂的制备简单,无危险反应,环境影响极小,使用便利,便于现场操作。(The invention relates to the field of cleaning agents capable of removing membrane sulfur scale, and discloses a special cleaning agent for membrane sulfide pollution, which comprises the following components in parts by volume: 10-60 parts of main component; the minor component accounts for 20 to 50 parts; 5-8 parts of cosolvent; 5-50 parts of a phase stabilizer; 10-80 parts of a solvent; wherein the main component is one or the combination of sodium hydroxide and potassium hydroxide; the minor component is one or the combination of dimethyl disulfide, fatty alcohol-polyoxyethylene ether and TX-10. The cleaning agent has no irritation, small corrosion to stainless steel and carbon steel, and stable cleaning agent phase system after dissolving film sulfur scale. Meanwhile, the sulfur in the system can form a crystallized sulfur precipitation cleaning agent system through simple operation means such as cooling and the like by the sulfur-removed cleaning agent, and the cleaning agent can be continuously recycled, so that the cleaning cost is reduced. In addition, the cleaning agent is simple to prepare, has no dangerous reaction, has little environmental influence, is convenient to use and is convenient for field operation.)

1. The special cleaning agent for membrane sulfide pollution is characterized by comprising the following components in parts by volume: 10-60 parts of main component; the minor component accounts for 20 to 50 parts; 5-8 parts of cosolvent; 5-50 parts of a phase stabilizer; 10-80 parts of a solvent;

wherein the main component is one or the combination of sodium hydroxide and potassium hydroxide;

the minor component is one or the combination of dimethyl disulfide, fatty alcohol-polyoxyethylene ether and TX-10.

2. The special cleaning agent for membrane sulfide contamination according to claim 1, characterized in that: the cosolvent is one or the combination of ethylene glycol, diethylamine, aniline, tetrahydrofuran, dimethylformamide and diethanolamine.

3. The special cleaning agent for membrane sulfide contamination according to claim 1, characterized in that: the phase stabilizer is one or the combination of diarylethane, N-methylpyrrolidone, tetraether and pyridine.

4. The special cleaning agent for membrane sulfide contamination according to claim 1, characterized in that: the solvent includes water, ethanol or acetone.

5. The special cleaning agent for membrane sulfide contamination according to claim 1, characterized in that: the operating temperature range of the special cleaning agent for membrane sulfide pollution is 25-45 ℃.

Technical Field

The invention relates to the field of cleaning agents capable of removing sulfur scale of membranes, and belongs to the technical field of chemical separation.

Background

Membrane technology is a promising separation technology, and membrane fouling affects membrane use, separation performance, and membrane lifetime. Among the numerous contaminations of the membrane, contaminations of microorganisms, organic matters, inorganic salts, etc., wherein contaminations of sulfides, i.e., sulfur scale, in inorganic salt contaminations belong to the type of contaminations which are difficult to clean.

The existence of sulfur scale increases the potential safety hazard of normal production of the membrane, and simultaneously brings a plurality of difficulties for the overhaul and maintenance of production equipment. The deposited sulfur scale can cause the membrane separation efficiency to be greatly reduced, and the normal operation of the device is seriously influenced. The sulfur scale is a mixed polymer mainly formed by elemental sulfur and other small amount of metal sulfides, metal oxides, sulfates and the like. The chemical property of the scale remover is very stable, the scale remover is basically insoluble in strong acid and strong alkali such as hydrochloric acid, sulfuric acid and the like, and the scale remover only has effect on partial components by adopting the conventional method for removing the scale with hot water.

At present, two methods of physical removal and chemical cleaning are mainly used for removing sulfur scale. The physical removal mainly comprises manual cleaning, high-pressure water gun flushing, steam heating purging, solvent physical dissolution and the like, wherein the manual cleaning and the water gun flushing generally refer to large equipment capable of entering people; the chemical cleaning is a method for removing sulfur scale by soaking and intermittent circulation of a solvent under a certain temperature or pressure to perform chemical conversion and dissolution on the sulfur scale. For membrane systems, physical methods are of little consequence.

In the market, carbon disulfide is physically dissolved, generally used as a main agent, and has the defects of high toxicity, flammability, easy volatilization, foul smell, low flash point and the like. Other solvents for membrane fouling removal have been reported only rarely. And most of the methods have the defects of high cost, low sulfur solubility, overlong dissolution time, strong corrosivity and the like.

Disclosure of Invention

In order to solve the problems, the invention provides a special cleaning agent for membrane sulfide pollution, aiming at the defects that the existing membrane sulfur scale removing agent is not environment-friendly or has an incomplete formula, the invention provides a physicochemical cleaning agent for removing membrane sulfur scale, the cleaning agent has no stink, little irritation and strong capability of removing sulfur scale, the cleaning agent can be recycled through regeneration, and the field operation is simple and convenient.

In order to achieve the purpose, the invention adopts the technical scheme that:

a special cleaning agent for membrane sulfide pollution comprises the following components in parts by volume: 10-60 parts of main component; the minor component accounts for 20 to 50 parts; 5-8 parts of cosolvent; 5-50 parts of a phase stabilizer; 10-80 parts of a solvent;

wherein the main component is one or the combination of sodium hydroxide and potassium hydroxide;

the minor component is one or the combination of dimethyl disulfide, fatty alcohol-polyoxyethylene ether and TX-10.

Preferably, the cosolvent is one of or a combination of ethylene glycol, diethylamine, aniline, tetrahydrofuran, dimethylformamide and diethanolamine.

Preferably, the phase stabilizer is one of diarylethane, N-methylpyrrolidone, tetraether, pyridine or a combination thereof.

Preferably, the solvent comprises water, ethanol or acetone.

Preferably, the operating temperature range of the special cleaning agent for membrane sulfide pollution is 25-45 ℃.

The beneficial effects of the invention are as follows:

the cleaning agent for removing the membrane sulfur scale combines the advantages of physical solvent and chemical cleaning, has no foul smell, no irritation and little corrosion to stainless steel and carbon steel, and has stable cleaning agent phase system after the membrane sulfur scale is dissolved. Meanwhile, the sulfur in the system can form a crystallized sulfur precipitation cleaning agent system through simple operation means such as cooling and the like by the sulfur-removed cleaning agent, and the cleaning agent can be continuously recycled, so that the cleaning cost is reduced. In addition, the cleaning agent is simple to prepare, has no dangerous reaction, has little environmental influence, is convenient to use and is convenient for field operation.

Detailed Description

In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.

A special cleaning agent for membrane sulfide pollution comprises the following components in parts by volume: 10-60 parts of main component; the minor component accounts for 20 to 50 parts; 5-8 parts of cosolvent; 5-50 parts of a phase stabilizer; 10-80 parts of a solvent;

wherein the main component is one or the combination of sodium hydroxide and potassium hydroxide;

the minor component is one or the combination of dimethyl disulfide, fatty alcohol-polyoxyethylene ether and TX-10.

Preferably, the cosolvent is one of or a combination of ethylene glycol, diethylamine, aniline, tetrahydrofuran, dimethylformamide and diethanolamine.

Preferably, the phase stabilizer is one of diarylethane, N-methylpyrrolidone, tetraether, pyridine or a combination thereof.

Preferably, the solvent comprises water, ethanol or acetone.

Preferably, the operating temperature range of the special cleaning agent for membrane sulfide pollution is 25-45 ℃.

The formulation of the cleaning agent is illustrated by the following examples